Yoga requires concentration

I'm doing yoga. You may know where this is going.

Tree pose, a balancing pose, requires quite a bit of concentration. From the kitchen, I hear my name.

"I'm busy."

"What?"

"I'm busy."

"What?"

Dad says "she said she's busy."

Not half an hour later comes crocodile pose, a semi-relaxation pose. I am assimilating the harmony of yoga, when I hear, from the front yard (through an open window to the room I'm in), my name.

I just say "hm?" and try to get back to my harmony.

Is she just checking on me? Wondering if I'm still there? What is so hard about not talking to me while I'm doing yoga?